Check Point Advisories

Microsoft Excel VisualBasic Object Validation Code Execution (MS08-057; CVE-2008-3477)

Check Point Reference: CPAI-2008-150
Date Published: 14 Oct 2008
Severity: Critical
Last Updated: Tuesday 14 October, 2008
Source:
Industry Reference:CVE-2008-3477
Protection Provided by:

Security Gateway
R81, R80, R77, R75, R71, R70, R65
Who is Vulnerable?
Vulnerability Description Microsoft Excel is a popular spreadsheet application. A remote code execution vulnerability has been identified in the way Microsoft Excel processes compiled VBA Projects. The vulnerability is due to an error in Microsoft Excel that fails to perform sufficient validation when using the Calendar Object. An attacker can exploit this flaw to execute arbitrary code on a vulnerable system via a specially crafted Excel file.

Protection Overview

This protection will detect and block the transferring over HTTP of Excel files with embedded visual basic ActiveX (VBA) object.

In order for the protection to be activated, update your Security Gateway product to the latest IPS update. For information on how to update IPS, go to SBP-2006-05, click on Protection tab and select the version of your choice.

Security Gateway R80 / R77 / R75 / R71 / R70 / R65

  1. In the IPS tab, click Protections and find the Microsoft Excel VisualBasic Object Validation Code Execution (MS08-057) protection using the Search tool and Edit the protection's settings.
  2. Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name:  Content Protection Violation.
Attack Information:  Microsoft Excel VisualBasic object validation code execution (MS08-057)

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